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Journal of Diabetes Research
Volume 2013, Article ID 382670, 9 pages
http://dx.doi.org/10.1155/2013/382670
Research Article

Endothelial Function in Women with and without a History of Glucose Intolerance in Pregnancy

1Leadership Sinai Centre for Diabetes, Mount Sinai Hospital, Toronto, ON, Canada M5T 3L9
2Division of Cardiology, Mount Sinai Hospital, Toronto, ON, Canada M5G 1X5
3Division of Cardiology, University of Toronto, Toronto, ON, Canada M5S 1A1
4Division of Endocrinology, University of Toronto, Toronto, ON, Canada M5S 1A1
5Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, ON, Canada M5G 1X5

Received 22 April 2013; Accepted 14 May 2013

Academic Editor: Ezekiel Uba Nwose

Copyright © 2013 Shireen Brewster et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background/Aims. Gestational diabetes mellitus (GDM) and milder gestational impaired glucose tolerance (GIGT) identify women who are at risk of developing cardiovascular disease. Endothelial dysfunction, as indicated by impaired flow-mediated dilatation (FMD) on brachial artery ultrasound, is an early marker of vascular disease. Thus, we sought to evaluate endothelial function in women with and without recent glucose intolerance in pregnancy. Methods. One-hundred and seventeen women underwent oral glucose tolerance testing (OGTT) in pregnancy, enabling stratification into those with normal gestational glucose tolerance ( ) and those with GDM or GIGT ( ). 6 years postpartum, they underwent a repeat of OGTT and brachial artery FMD studies, enabling assessment of FMD and 4 secondary vascular measures: FMD after 60 seconds (FMD60), baseline arterial diameter, peak shear rate, and reactive hyperemia. Results. There were no differences between the normal gestational glucose tolerance and GDM/GIGT groups in FMD (mean 8.5 versus 9.3%, ), FMD60 (4.1 versus 5.1%, ), baseline diameter (3.4 versus 3.4 mm, ), peak shear rate (262.6 versus 274.8 s−1, ), and reactive hyperemia (576.6 versus 496.7%, ). After covariate adjustment, there were still no differences between the groups. Conclusion. Despite their long-term cardiovascular risk, women with glucose intolerance in pregnancy do not display endothelial dysfunction 6 years postpartum.